Heidi Klum's racy butt selfie

The 42-year-old supermodel sent pulses racing when she posted an explicit snap on her Instagram account - featuring her bum being hit with a spoon with the words "the naughty spoon" emblazoned on it.

The tongue-in-cheek star captioned the picture: "Ouch".

Heidi's sexy selfie of her pert derriere comes just a few weeks after she hit back at Donald Trump for saying "she's no longer a 10".

The United States presidential candidate made the controversial comments in an interview with the New York Times, but Heidi took the comments in good humour and proceeded to make fun of Trump.

In a video clip posted to Twitter, the gorgeous blonde is seen wearing a sign with the number 10 on it, only for a man in a Trump mask to rip off the sign, leaving her with just a 9.99 emblazoned on her T-shirt.